ok, I took the lens board off and screwed off the cover of the shutter...sprayed some lighter fluid on the shutter blades and triggered the shutter many times at different speeds and aperatures and the same thing happens. At 1 sec, 1/2 sec and 1/4 sec, the shutter fires and closes...although at a higher speed than it should. Anything above 1/4 sec (>1/4) the shutter opens but stays open. Any ideas??